src.app.core.services.prometheus.service.ts Maven / Gradle / Ivy

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/*
 * SPDX-FileCopyrightText: 2017-2024 Enedis
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 */

import { Injectable } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { environment } from '@env/environment';
import { map, Observable } from 'rxjs';
import { Metric } from '@core/model/metric.model';

@Injectable({
    providedIn: 'root'
})
export class PrometheusService {

    private url = '/actuator';
    constructor(private http: HttpClient) {
    }

    public getMetrics(): Observable {
        return this.http.get(environment.backend + this.url + '/prometheus', { responseType: 'text' })
        .pipe(map((res: string) => {
            const metricRegex = new RegExp('(?[^{]*)(?{.*})? (?.*)');
            return res.split('\n')
            .filter(element => element && !element.startsWith('#'))
            .map(element => {
                const [, name, tags, value] = metricRegex.exec(element) || [];
                return new Metric(name, tags, value);
            });
        }));
    }
}